Best Online Casino Bonus (& How Casino Bonuses Work)


The best things in life are rarely ever simple. Online casinos operate worldwide, and they present you with the chance to potentially win large sums of money. Better yet, they can offer some incredible online casino bonuses that may help you and could also extend your gaming experience. 

However, these online casino bonuses aren't always easy to understand, but there's no need to worry. We'll help you discover everything you need to know about the best online casino bonuses and how they work. We'll also present a list of some of the best online casino bonuses you can find in the UK.

If you want to try your hand out at online casino games, check out our extensive game catalogue here at Kong Casino. We have titles from over 30 providers and have a variety of games such as slots, jackpot games, live dealer games, and more! So, there's something for everyone at Kong Casino. 

Best Online Casino Bonuses and How They Work 

Online casino bonuses can be great for players as they can help them potentially win more and play for longer. There are numerous online casino bonuses that you may encounter, so let's discuss some of the most common ones:

  • The Welcome Bonus 

This is offered by almost every online casino. It's usually a cash reward you can claim once you sign up and make a minimum deposit. However, this can vary depending on the site. Here at Kong Casino, once you sign up and make a minimum deposit of £10, you can claim our Welcome Offer of a 100% Match Up Bonus, up to £200 + 50 Free Spins on Big Bass Bonanza (Full T&Cs Apply).

  • The No Deposit Bonus

No deposit bonuses allow players to potentially get some cash or extra spins to play with before depositing. Usually, you can cash out your bonus once you've completed the requirements, but be sure to check the terms and conditions for these.

  • The High Roller Bonus 

This bonus is typically reserved for players who make huge deposits. It's almost like a loyalty bonus. However, not all online casinos offer this.

  • The Monthly Bonus

Most casinos reward loyalty by giving you a monthly bonus. Some casinos may even offer a variety of seasonal promotions during the year.

  • Certain Game-Specific Bonuses

Casinos sometimes offer bonuses for their feature games. Rewards like extra spins may also be up for grabs, so be sure to check.

  • Device-Specific Bonuses

Some casinos will reward you if you download their app on your smartphone and or tablet. Casinos can also offer incentives to players who try out certain mobile games

Best Online Casino Bonus for UK Players 

Several options exist for finding a good online casino bonus for players residing in the UK. However, which option is the best? 

Here at Kong Casino, new players who sign up and make a minimum deposit of £10 can claim our Welcome Offer of a 100% Match Up Bonus, up to £200 + 50 Free Spins on Big Bass Bonanza (Full T&Cs Apply).

This can be a great option for new online slots players. Kong Casino offers some of the best slots, table and live dealer games around! 

Some of our more popular online slot games include:

    • Fishin’ Frenzy Big Catch
    • 88 Fortunes
  • King Casino - Sign up and make a minimum deposit (£20) up to £50 plus 20 Extra Spins on Book of Dead. Players who make a second deposit can claim a 50% bonus up to £100 plus 30 Extra Spins on Starburst. 18+. New Players Only. Min. deposit £20. UK players. Max. bonus 1st deposit 100% up to £50 and 2nd deposit 50% up to £100. Max wins from spins £100. 35x wagering applies, within 21 days. 20 spins on 1st deposit and 30 spins on 2nd deposit. Spins expire after 24 hours. Full T&Cs apply.
  • Wizard Slots - Join and deposit £10 to claim the Welcome Offer and spin the Mega Reel for a chance to win up to 500 free spins on Starburst and Fluffy Favourites. New players only, min deposit £10, max bonus equal to lifetime deposits (up to £250), 65x wagering requirements and full T&Cs apply.
  • NoDepositSlots - 5 free spins no deposit on Burning Wins to all new players. New players only, no deposit required, valid debit card verification required, max bonus conversion £50, 65x wagering requirement, full T&Cs apply here.
  • SlotSitesUK - Sign up and deposit £10 to claim 100% matchup bonus worth up to £200. New players only, £10 min fund, £200 max bonus, max bonus conversion equal to lifetime deposits (up to £250), 65x wagering requirements and T&Cs apply.

How Does a Casino Bonus Actually Work? 

Wondering how a casino bonus works? Well, most casino bonuses now work with what's called a bonus percentage. This is a number (usually in the range of 50% - 200%) that refers to how much of your deposit you can match as a bonus.

That's not all! There's a second number in an online casino bonus that is usually before the words' up to', which is typically the maximum amount the casino can match as a bonus.

To avoid any confusion, let's take a look at an example. If it's a bonus percentage of 200% up to £300, then a deposit of £50 can potentially get you a bonus of £100. A deposit of £150 might get you a bonus of £300 (which is the maximum bonus the casino is giving out in this case - 200% up to £300).

What Casino Bonus is Best for New Players?

Although several casino bonuses are available, all of which are great, the sign-up or welcome bonus is the most popular and considered the best. This is usually a percentage of your first deposit and can potentially help you when you start playing at an online casino.

Almost all casinos offer the sign-up bonus, making them incredibly easy to find.

Are Casino Bonuses Worth it? 

Casino bonuses can help you make the most of your gaming experience, and no matter which casino you choose, the bonus will almost certainly be worth collecting. However, it is important that you also read the terms and conditions associated with each to see if it’s a good fit for you.

Why do Online Casinos Offer Bonuses?

Online casino bonuses have 2 prime motives: attracting and rewarding players. These bonuses entertain the players and can keep them happy. They also give players the sense of getting a good deal, and players can get bonuses for various reasons, such as opening an account or playing a specific game or scratch card.

Online casinos try to be creative to acquire new customers. For this reason, they keep offering players various types of bonuses. First, you should always read the bonus rules and learn about the wagering requirement to ensure your bonus is a good fit. 

Can You Keep What You Win & Withdraw Bonus Balance? 

No, your bonus balance will only be available for withdrawal once you have met the wagering requirements of a particular bonus. When wagering requirements have been met, you will usually find that your bonus balance is transferred to your cash/ real money balance. It is important to read all the bonus terms and conditions, to understand whether all or just part of your bonus balance will be transferred on completion of wagering.

What are Wagering Requirements? 

Along with every casino bonus, you will find some wagering requirements. This is the amount of cash you need to bet before you may get physical access to your bonus funds. These requirements are mostly set between 20x - 50x the value of your initial deposit or the bonus cash you can get. 

E.g. in a 50x wagering requirement, you usually have to wager your bonus amount 50 times before you're allowed to withdraw it or any winnings from it. So, be sure to read the terms and conditions carefully.